KR20010002736A - The processing method of guide block using polymer concrete - Google Patents

The processing method of guide block using polymer concrete Download PDF

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Publication number
KR20010002736A
KR20010002736A KR1019990022687A KR19990022687A KR20010002736A KR 20010002736 A KR20010002736 A KR 20010002736A KR 1019990022687 A KR1019990022687 A KR 1019990022687A KR 19990022687 A KR19990022687 A KR 19990022687A KR 20010002736 A KR20010002736 A KR 20010002736A
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weight
parts
polyester resin
unsaturated polyester
curing
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KR1019990022687A
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Korean (ko)
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KR100300489B1 (en
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이윤수
연규석
최동순
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이윤수
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/10Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/18Polyesters; Polycarbonates
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C15/00Pavings specially adapted for footpaths, sidewalks or cycle tracks
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10Accelerators; Activators
    • C04B2103/14Hardening accelerators
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/54Pigments; Dyes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Abstract

PURPOSE: A method for preparing induction blocks by using polymer concrete is provided, to improve the adhesion, the strength, to reduce the weight and to prevent the freezing breakage due to low absorption. CONSTITUTION: The method comprises the steps of mixing 100 parts by weight of unsaturated polyester resin and 7-15 parts by weight of a shrinkage reducing agent to prepare a binder; mixing 100 parts by weight of the binder, 1-2 parts by weight of a color and 1-2 parts by weight of a curing agent, pouring the mixture on the region corresponding to the induction block, curing it for 20 min, and semi-curing it; pouring the mixture consisting of 100 parts by weight of the binder, 1-2 parts by weight of a curing agent, 120-140 parts by weight of a filler, and 500-600 parts by weight of aggregate, on the semi-cured unsaturated polyester resin and curing it totally; and spraying the fiber reinforced plastic comprising unsaturated polyester resin and glass fiber on the bottom of the totally cured lower plate(13), to form a fiber reinforced plastic layer(14).

Description

폴리머 콘크리트를 이용한 유도블럭의 제조방법{The processing method of guide block using polymer concrete}The manufacturing method of guide block using polymer concrete

본 발명은 폴리머 콘크리트를 이용한 유도블럭의 제조방법에 관한 것으로, 상판은 불포화 폴리에스터수지로 하고, 하판은 불포화 폴리에스터 수지를 바인더로 첨가한 폴리머 콘크리트로 하여 유도블럭을 제조할 수 있도록 한 폴리머 콘크리트를 이용한 유도블럭의 제조방법에 관한 것이다.The present invention relates to a method of manufacturing an induction block using polymer concrete, wherein the upper plate is made of unsaturated polyester resin, and the lower plate is made of polymer concrete in which unsaturated polyester resin is added as a binder. It relates to a method of manufacturing an induction block using.

근래에는 사회발전과 더불어 사회복지 시설의 관심이 증대되면서 장애인 편의 시설에 대한 관심도 크게 증가하고 있다.Recently, with the development of society, the interest in social welfare facilities has increased, so the interest in facilities for the disabled has increased greatly.

특히, 공공기관 및 장애인 복지시설에 설치된 유도블럭과 점자 안내판 그리고 음향ㆍ유도 신호기 등과 같은 시각장애인을 위한 편의 시설이 크게 증가하고 있다.In particular, convenience facilities for the visually impaired such as judo blocks, braille signs, and sound and guidance signals installed in public institutions and welfare facilities for the disabled are increasing.

상기 시각장애인 편의 시설중 유도블럭은 시각장애인이 통상의 보행상태에서 주로 발바닥이나 지팡이의 촉감으로 그 존재 및 대강의 형태를 확인할 수 있도록 돌기를 표면에 양각시킨 블럭으로서 시각장애인에게 보다 정확한 보행 위치와 보행 방향을 안내하기 위해 설치하는 시설물이다.Among the facilities for the visually impaired, the induction block is a block in which the projection is embossed on the surface so that the visually impaired person can check the existence and the rough shape by the touch of the sole or the cane in the normal walking state. This facility is installed to guide the direction of walking.

시각 장애인용 유도블럭에는 위치 표시용 유도블럭과 유도 표시용 유도블럭이 있으며 옥내용과 옥외용으로 구별된다.Induction blocks for the visually impaired include a location indication induction block and a guidance indication induction block, which are classified into indoor and outdoor use.

위치 표시용 유도블럭은 점형블럭으로 굴절부, 단차부분 및 위험장소의 0.3m 전면에 부설하는 것으로, 보행동선의 분기점, 대기점, 시발점 및 목적지점 등의 위치표시 및 위험 지역 표시에 사용하고 있다.The induction block for position display is a pointed block that is placed on the 0.3m front of the refraction, step, and dangerous places, and is used for indicating the location of danger points, queuing points, starting points, and destination points and marking dangerous areas. .

유도 표시용 유도블럭은 선형블럭으로 유도방향에 따라 평행하게 연속해서 부설하는 것으로, 보행동선의 분기점, 대기점, 시발점에서 목적 방향으로 설치하여 정확한 방향을 잡는데 사용한다.The guidance block for guidance display is a linear block which is laid continuously and parallel to the guidance direction. It is used to set the correct direction by installing it in the target direction at the branch point, the waiting point, and the starting point of the walking line.

옥내용과 옥외용 유도블럭은 하판의 유무에 따라 구별되는데 옥외용의 경우 옥내용으로 제조된 유도블럭을 상판으로 하고 따로 제조한 하판을 접착시켜 사용하고 있다.Indoor and outdoor induction blocks are distinguished according to the presence or absence of the lower plate. In the case of outdoor use, the induction block manufactured for indoor use is used as the top plate, and the separately manufactured lower plate is bonded.

상기와 같은 종래 유도블럭은 도 1에서 보는 바와 같이 상판, 접착면 및 하판으로 구성되어 있다.The conventional induction block as described above is composed of an upper plate, an adhesive surface and a lower plate as shown in FIG.

좀더 상세하게 설명하면, 상판(1)은 천연고무 및 합성고무와 색소를 첨가하여 도 1과 같이 돌출부분의 높이를 5mm로 하고 판의 두께를 2mm로 제조한다.In more detail, the top plate 1 is made of natural rubber, synthetic rubber, and pigments to make the height of the protruding portion 5 mm and the thickness of the plate 2 mm as shown in FIG. 1.

이때 상판의 색상은 원칙적으로 황색을 사용하여야 하나, 상황에 따라 바닥재의 색상과 구별이 용이한 것을 선택하여 사용하고 있다.In this case, the color of the top plate should be yellow in principle. However, depending on the situation, the color of the floor board is easily selected and used.

하판(3)은 시멘트와 골재를 혼합한 시멘트 콘크리트판, 또는 석판을 도 1에서 보는 바와 같이 300mm× 300mm×53mm(가로×세로×두께)의 규격으로 제조한다.The lower plate 3 is made of a cement concrete plate or a slab in which cement and aggregate are mixed in a standard of 300 mm x 300 mm x 53 mm (width x length x thickness) as shown in FIG.

이렇게 제조한 상판(1)과 하판(3)은 상판(1)만을 따로 옥내용 유도블럭으로 사용하거나, 상판(1)의 하단면에 접착제를 바르고 접착면(2)에 하판(3)을 접착시켜 옥외용 유도블럭으로 사용하고 있다.The upper plate (1) and the lower plate (3) manufactured in this way can be used as the indoor induction block of the upper plate (1) separately, or by applying an adhesive to the lower surface of the upper plate (1) and adhering the lower plate (3) to the adhesive surface (2) It is used as outdoor induction block.

그러나 상기한 방법에 의해 제조된 옥외용 유도블럭의 경우, 상판은 고무 및 합성고무 층으로 미끄럽고, 또한 상판과 하판의 시멘트 콘크리트판 또는 석판 등의 재질이 상이하므로 접착력이 감소하여 쉽게 분리된다.However, in the case of the outdoor induction block manufactured by the above method, the upper plate is slippery with rubber and synthetic rubber layers, and also because the material of the cement concrete plate or slab of the upper plate and the lower plate is different, the adhesive force decreases and is easily separated.

따라서, 시각장애인에게 있어 발바닥이나 지팡이의 촉감으로 그 존재 및 대강의 형태를 확인할 수 있는 유도블럭 본래의 기능을 발휘하지 못하여 무용지물이 되는 경우가 적지 않다.Therefore, in the visually impaired, the induction block that can check the presence and the rough shape by the touch of the sole or the cane is not often usedless.

또한, 이탈된 상판 또는 마모된 상판은 하판에서 제거하고, 새로운 상판에 접착제를 붙여 하판에 접착시키거나, 하판 자체를 보도블럭에서 이탈시켜 재시공해야 하는 등 작업의 불편함이 있다.In addition, the detached top plate or the worn top plate is removed from the bottom plate, and adheres to the bottom plate by attaching an adhesive to the new top plate, or the bottom plate itself has to be removed from the sidewalk block and reconstructed.

특히, 하판이 시멘트 콘크리트 및 석판이므로 중량이 무거워 시공이 불편할 뿐만 아니라, 높은 흡수율로 인해 동결 파손될 우려가 높다. 또한 상판과 하판을 따로 제작하여 접착제로 접착하여야 하므로 제작 과정이 불편하다는 문제점이 있다.In particular, since the lower plate is cement concrete and slab, the weight is heavy and the construction is inconvenient, and there is a high possibility of freezing and breakage due to high absorption rate. In addition, there is a problem in that the manufacturing process is inconvenient because the upper and lower plates must be manufactured separately and bonded with an adhesive.

본 발명은 상기와 같은 종래 문제점을 해결하기 위한 것으로, 상판은 불포화 폴리에스터수지로 하고, 하판은 불포화 폴리에스터수지를 첨가한 폴리머 콘크리트로 하여 유도블럭을 제조하므로써 접착력이 감소되지 않고, 하판의 중량을 감소시켜 작업이 편리하면서도 강도가 뛰어날 뿐만 아니라, 낮은 흡수율에 따른 동결 파손을 효과적으로 방지 할 수 있는 폴리머 콘크리트를 이용한 유도블럭의 제조방법을 제공하는 데 그 목적이 있다.The present invention is to solve the conventional problems as described above, the upper plate is made of unsaturated polyester resin, the lower plate is made of polymer concrete to which the unsaturated polyester resin is added, the adhesive force is not reduced by producing the induction block, the weight of the lower plate The purpose of the present invention is to provide a method of manufacturing an induction block using polymer concrete that can effectively prevent freeze damage due to low absorption rate by reducing work convenience and excellent strength.

도 1은 일반적인 유도블럭 구조를 나타낸 사사도1 is a perspective view showing a general induction block structure

도 2는 본 발명에 의해 제조된 유도블럭의 일실시예를 나타낸 사시도Figure 2 is a perspective view showing one embodiment of the induction block produced by the present invention

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1, 11 : 상판1, 11: top plate

2, 12 : 접착면2, 12: adhesive surface

3, 13 : 하판3, 13: bottom plate

14 : 섬유강화 플라스틱층14 fiber reinforced plastic layer

15 : 홈부15: groove

상기한 목적을 달성하기 위한 본 발명은, 불포화 폴리에스터수지 100중량부에 대하여 수축저감제 7내지 15중량부를 혼합하여 바인더를 제조하는 제 1공정과; 상기에서 제조한 바인더 100중량부에 대하여 색소 1내지 2중량부와 경화제 1내지 2중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 불포화 폴리에스터수지를 반경화시키는 제 2공정과; 반경화된 불포화 폴리에스터수지 위에 상기 1차공정에서 제조한 바인더 100중량부에 대하여 경화제 1내지 2중량부, 충진제 120내지 140중량부 및 골재 500내지 600중량부의 성분비를 갖는 폴리머 콘크리트를 타설하여 완전경화시키는 제 3공정과; 완전경화된 하판의 바닥에 불포화 폴리에스터수지와 유리섬유를 혼합한 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱 층을 형성시키는 제 4공정으로 이루어진 폴리머 콘크리트를 이용한 유도블럭의 제조방법을 제공함으로써 달성할 수 있다.The present invention for achieving the above object is a first step of producing a binder by mixing 7 to 15 parts by weight of shrinkage reducing agent with respect to 100 parts by weight of unsaturated polyester resin; A second step of semi-curing unsaturated polyester resin by adding 1 to 2 parts by weight of pigment and 1 to 2 parts by weight of the curing agent, and curing for 20 minutes by pouring the portion corresponding to the induction block top plate with respect to 100 parts by weight of the binder prepared above. and; Completely cast polymer concrete having a component ratio of 1 to 2 parts by weight of the curing agent, 120 to 140 parts by weight of filler and 500 to 600 parts by weight of aggregate based on 100 parts by weight of the binder prepared in the first step on the semi-cured unsaturated polyester resin. A third step of curing; It can be achieved by providing a method of manufacturing an induction block using polymer concrete, which is composed of a fourth step of forming a fiber-reinforced plastic layer by spraying a fiber-reinforced plastic mixed with unsaturated polyester resin and glass fibers on the bottom of a fully hardened bottom plate. have.

이하 본 발명의 제조공정을 첨부한 도면을 가지고 상세하게 설명하기로 한다.Hereinafter, the manufacturing process of the present invention will be described in detail with the accompanying drawings.

도 2는 본 발명에 의해 제조된 유도블럭의 일실시예를 나타낸 사시도 이다.Figure 2 is a perspective view showing one embodiment of the induction block produced by the present invention.

제 1공정에서는 불포화 폴리에스터수지와 수축저감제를 혼합하여 바인더를 제조하는 공정으로 불포화 폴리에스터수지 100중량부에 대하여 수축저감제 7내지 15중량부를 혼합하여 바인더를 제조한다.In the first step, a binder is prepared by mixing an unsaturated polyester resin and a shrinkage reducing agent to prepare a binder by mixing 7 to 15 parts by weight of the shrinkage reducing agent with respect to 100 parts by weight of the unsaturated polyester resin.

불포화 폴리에스터수지란 그 구성분자의 포화된 모노머가 에스테르 결합으로 중합된 고분자 화합물로 다른 폴리머에 비해 취급이 쉽고 경화성이 뛰어나며, 상온에서 자유롭게 경화시킬 수 있을 뿐만 아니라 다른 열경화성수지에 비하여 가격이 저렴하다. 본 발명에서는 스틸렌 함량이 38%인 올소타입(ortho type) 불포화 폴리에스터수지를 사용하였다.Unsaturated polyester resin is a polymer compound in which the saturated monomers of the constituent molecules are polymerized by ester bonds, and are easier to handle than other polymers, have excellent curability, and can be freely cured at room temperature. . In the present invention, an ortho type unsaturated polyester resin having a styrene content of 38% was used.

본 발명에서는 수축저감제로 열가소성인 폴리스틸렌을 스틸렌 모노머에 용해시킨 수축저감제를 첨가하였는데, 이것은 불포화 폴리에스터수지가 경화되는 동안 재료가 응집하기 때문에 발생하는 폴리머 콘크리트의 체적수축을 방지하기 위한 것이다.In the present invention, a shrinkage reducing agent in which thermoplastic polystyrene is dissolved in a styrene monomer is added as a shrinkage reducing agent. This is to prevent volume shrinkage of polymer concrete caused by aggregation of materials during curing of an unsaturated polyester resin.

일반적으로 불포화 폴리에스터수지는 경화시 7내지 10%의 큰 수축을 일으키는데, 이것은 경화속도에 관계없이 수지 중의 스틸렌 모노머의 함량에 따라 변화된다. 따라서 이를 방지하기 위해 수축저감제를 7내지 15중량부 정도 첨가하는 것이다.In general, unsaturated polyester resins produce a large shrinkage of 7 to 10% upon curing, which varies with the content of styrene monomer in the resin, regardless of the rate of cure. Therefore, to prevent this is to add about 7 to 15 parts by weight of shrinkage reducing agent.

수축저감제의 첨가량이 15중량부를 초과할 경우 강도가 약해지고, 7중량부 미만일 경우 강도는 강해지나 불포화 폴리에스터수지의 수축을 방지하지 못하는 문제점이 있다.When the amount of the shrinkage reducing agent is more than 15 parts by weight, the strength is weakened. When the amount of the shrinkage reducing agent is less than 7 parts by weight, the strength becomes strong, but there is a problem in that the shrinkage of the unsaturated polyester resin is not prevented.

제 2공정에서는 제 1공정에서 제조한 바인더 100중량부에 대하여 색소 1내지 2중량부 및 경화제 1내지 2중량부를 첨가하여 거푸집의 유도블럭 상판(11)에 해당하는 부분만큼 타설한 뒤 상온에서 20분 정도 양생하여 반경화시키게 된다.In the second step, 1 to 2 parts by weight of dye and 1 to 2 parts by weight of the curing agent are added to 100 parts by weight of the binder prepared in the first step, and then poured as much as the portion corresponding to the induction block upper plate 11 of the form 20 at room temperature. It will cure for about a minute and semi-cured.

색소는 원칙적으로 황색을 사용하여야 하나, 상황에 따라 바닥재의 색상과 구별이 용이한 것을 선택하여 사용한다.In principle, yellow should be used. However, depending on the situation, choose a color that is easy to distinguish from the color of the flooring.

또, 경화제는 불포화 폴리에스터수지가 경화반응을 할 수 있도록 첨가하는 것으로, 속경형, 표준 경화형 및 지연형 3종류가 있으나, 본 발명에서는 메틸 에틸 케톤 퍼옥사이드(methyl ethyl ketone peroxide)를 55%함유하는 표준 경화형 경화제를 사용하였다. 불포화 폴리에스터수지에 경화제가 첨가되면 경화가 되는데 거푸집에 타설한 뒤 상온에서 20분 정도 양생을 하게 되면 반경화된 상태로 된다.In addition, the curing agent is added to allow the unsaturated polyester resin to cure, there are three types of fast curing type, standard curing type and delay type, but in the present invention contains 55% methyl ethyl ketone peroxide (methyl ethyl ketone peroxide) A standard curable curing agent was used. When the curing agent is added to the unsaturated polyester resin, it is cured. If it is cured at room temperature for 20 minutes after being poured into the formwork, it becomes a semi-cured state.

이때 반경화된 상태에서 하기한 과정을 거치지 않고 상온에서 완전경화시키게 되면 상판만을 따로 옥내용 유도블럭으로 사용 가능하다.At this time, if completely cured at room temperature without undergoing the following process in a semi-cured state, only the top plate can be used as an indoor induction block.

제 3공정에서는 상기 제 1공정에서 제조한 바인더 100중량부에 대하여 경화제 1내지 2중량부, 충진제 120내지 140중량부 및 골재 500내지 600중량부의 성분 및 성분비를 갖는 폴리머 콘크리트를 상기 제 2공정에서 반경화된 상태의 불포화 폴리에스터수지 위에 타설하여 반경화시키게 된다.In the third step, polymer concrete having components of 1 to 2 parts by weight, fillers 120 to 140 parts by weight, and aggregates 500 to 600 parts by weight based on 100 parts by weight of the binder prepared in the first step is polymer concrete. It is poured onto a semi-cured unsaturated polyester resin and semi-cured.

이때 하판(13)은 도 1에서와 같이 일반적인 형태로 타설할 수도 있으나, 시공 및 운반상의 편의를 위하여 도 2에서와 같이 내부에 홈부(15)가 형성되도록 타설하여 중량을 감소시키는 것이 바람직하다.In this case, the lower plate 13 may be cast in a general form as shown in FIG. 1, but it is preferable to reduce the weight by placing the groove 15 in the inside as shown in FIG. 2 for convenience of construction and transportation.

일반적으로 충진제는 비교적 고가인 폴리머의 사용량을 줄일 목적으로 사용하는데 본 발명에서는 저가이면서 구입이 용이한 탄산칼슘을 사용하였다. 충진제의 양이 140중량부를 초과할 경우 충진이 잘되어 강도는 강해지나 폴리머의 양이 상대적으로 줄어들기 때문에 혼합이 어려워 작업성이 떨어진다. 반대로 충진제가 120중량부 미만일 경우 혼합은 용이하나 강도가 떨어진다는 문제점이 있다.Generally, fillers are used for the purpose of reducing the amount of polymers, which are relatively expensive. In the present invention, inexpensive calcium carbonate is used. If the amount of the filler exceeds 140 parts by weight, the filling is good, the strength is strong, but the mixing is difficult because the amount of the polymer is relatively reduced, the workability is poor. On the contrary, when the filler is less than 120 parts by weight, there is a problem in that the mixing is easy but the strength is lowered.

골재는 쇄석 및 강모래를 6대 4의 비율로 혼합한 것을 500내지 600중량부 첨가하였다. 골재의 사용량이 600중량부를 초과할 경우 상대적으로 폴리머의 사용량이 적어지므로 결합력이 약해져 다짐이 불량해지고, 반대로 500중량부 미만일 경우 폴리머의 사용량이 많아지므로 가격상승 요인으로 작용한다.Aggregate was added 500 to 600 parts by weight of a mixture of crushed stone and steel sand in a ratio of 6 to 4. When the amount of aggregate exceeds 600 parts by weight, the amount of polymer is relatively low, so the bonding strength becomes weak, and the compaction becomes poor. On the contrary, when the amount of the aggregate is less than 500 parts by weight, the amount of the polymer increases, which acts as a factor of price increase.

기존 옥외용 유도블럭의 제조방법에 있어서는 상판과 하판을 접착제를 사용하여 접착시키나 폴리머 콘크리트를 이용한 유도블럭의 제조방법에 있어서는 접착제를 사용하지 않아도 상ㆍ하판의 접착면(12)이 동일재료인 바인더로 인하여 접착이 이루어지게 된다.In the existing manufacturing method of outdoor induction block, the upper plate and the lower plate are bonded using an adhesive, but in the manufacturing method of the induction block using polymer concrete, the bonding surface 12 of the upper and lower plates is made of the same material without the adhesive. Due to the adhesion is made.

즉, 상판의 불포화 폴리에스터수지가 완전경화되기 전에 폴리머 콘크리트를 타설함으로써 반경화된 불포화 폴리에스터수지와 폴리머 콘크리트내의 불포화 폴리에스터수지가 경화반응으로 인해 접착이 이루어지게 되는 것이다.In other words, by placing the polymer concrete before the unsaturated polyester resin of the top plate is completely cured, the semi-cured unsaturated polyester resin and the unsaturated polyester resin in the polymer concrete are bonded by the curing reaction.

제 4공정에서는 완전경화된 하판(13) 내부의 홈부(15)로 인해 파괴하중이 약화되는 것을 보강하기 위하여 하부의 바닥에 불포화 폴리에스터수지와 유리섬유를 섞은 섬유강화 플라스틱(FRP : Fiber reinforced plastics)을 분사하여 섬유강화 플라스틱층(14)을 형성시킨다.In the fourth process, fiber reinforced plastics (FRP) are formed by mixing unsaturated polyester resin and glass fiber at the bottom of the bottom in order to reinforce the fracture load due to the groove 15 inside the fully hardened lower plate 13. ) To form a fiber-reinforced plastic layer (14).

이하 본 발명을 실시예 및 시험예를 통하여 상세하게 설명하기로 한다.Hereinafter, the present invention will be described in detail through Examples and Test Examples.

<실시예 1><Example 1>

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 10중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블록 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 130중량부 및 골재 540중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 완전경화시킨 후 하판의 바닥에 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱층을 형성시켜 유도블럭을 제조하였다.A binder was prepared by mixing 10 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin, and then 2 parts by weight of a dye and 1 part by weight of a curing agent were added to 100 parts by weight of the binder to pour the portion corresponding to the induction block top plate. Cured and cured for 20 minutes, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 130 parts by weight of filler and 540 parts by weight of aggregate based on 100 parts by weight of the binder prepared on the semi-cured unsaturated polyester resin. After injecting the grooves to form a complete curing, the fiber-reinforced plastic was sprayed on the bottom of the lower plate to form a fiber-reinforced plastic layer to prepare an induction block.

<실시예 2><Example 2>

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 20중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 130중량부 및 골재 540중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 완전경화시킨 후, 하판의 바닥에 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱 층을 형성시켜 유도블럭을 제조하였다.A binder was prepared by mixing 20 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin, and then, 2 parts by weight of a dye and 1 part by weight of a curing agent were added to 100 parts by weight of the binder to pour the portion corresponding to the induction block top plate. Cured and cured for 20 minutes, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 130 parts by weight of filler and 540 parts by weight of aggregate based on 100 parts by weight of the binder prepared on the semi-cured unsaturated polyester resin. After pouring the groove to form a complete curing, by spraying the fiber-reinforced plastic to the bottom of the bottom plate to form a fiber-reinforced plastic layer to prepare an induction block.

<실시예 3><Example 3>

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 5중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블록 상판에 해당하는 만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 130중량부 및 골재 540중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 완전경화시킨 후, 하판의 바닥에 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱 층을 형성시켜 유도블럭을 제조하였다.After preparing a binder by mixing 5 parts by weight of shrinkage reducing agent with respect to 100 parts by weight of unsaturated polyester resin, 2 parts by weight of dye and 1 part by weight of curing agent were added to 100 parts by weight of binder, and then poured as much as the induction block top plate. Cured for 20 minutes and cured, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 130 parts by weight of filler, and 540 parts by weight of aggregate based on 100 parts by weight of the binder prepared on the semi-cured unsaturated polyester resin was grooved therein. After the addition was poured so as to form a complete curing, the fiber-reinforced plastic was sprayed on the bottom of the bottom plate to form a fiber-reinforced plastic layer to prepare an induction block.

<실시예 4><Example 4>

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 10중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 160중량부 및 골재 540중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 완전경화시킨 후 하판의 바닥에 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱층을 형성시켜 유도블럭을 제조하였다.A binder was prepared by mixing 10 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin, and then 2 parts by weight of a dye and 1 part by weight of a curing agent were added to 100 parts by weight of the binder to pour the portion corresponding to the induction block top plate. Cured and cured for 20 minutes, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 160 parts by weight of filler and 540 parts by weight of aggregate based on 100 parts by weight of the binder prepared on the semi-cured unsaturated polyester resin. After injecting the grooves to form a complete curing, the fiber-reinforced plastic was sprayed on the bottom of the lower plate to form a fiber-reinforced plastic layer to prepare an induction block.

<실시예 5>Example 5

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 10중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 100중량부 및 골재 540중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 완전경화시킨 후 하판의 바닥에 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱층을 형성시켜 유도블럭을 제조하였다.A binder was prepared by mixing 10 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin, and then 2 parts by weight of a dye and 1 part by weight of a curing agent were added to 100 parts by weight of the binder to pour the portion corresponding to the induction block top plate. Cured and cured for 20 minutes, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 100 parts by weight of filler and 540 parts by weight of aggregate based on 100 parts by weight of the binder prepared above on a semi-cured unsaturated polyester resin. After injecting the grooves to form a complete curing, the fiber-reinforced plastic was sprayed on the bottom of the lower plate to form a fiber-reinforced plastic layer to prepare an induction block.

<실시예 6><Example 6>

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 10중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 100중량부 및 골재 650중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 완전경화시킨 후 하판의 바닥에 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱층을 형성시켜 유도블럭을 제조하였다.A binder was prepared by mixing 10 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin, and then 2 parts by weight of a dye and 1 part by weight of a curing agent were added to 100 parts by weight of the binder to pour the portion corresponding to the induction block top plate. Cured and cured for 20 minutes, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 100 parts by weight of filler and 650 parts by weight of aggregate based on 100 parts by weight of the binder prepared on the semi-cured unsaturated polyester resin. After injecting the grooves to form a complete curing, the fiber-reinforced plastic was sprayed on the bottom of the lower plate to form a fiber-reinforced plastic layer to prepare an induction block.

<실시예 7><Example 7>

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 10중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 100중량부 및 골재 450중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 완전경화시킨 후 하판의 바닥에 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱층을 형성시켜 유도블럭을 제조하였다.A binder was prepared by mixing 10 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin, and then 2 parts by weight of a dye and 1 part by weight of a curing agent were added to 100 parts by weight of the binder to pour the portion corresponding to the induction block top plate. Cured and cured for 20 minutes, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 100 parts by weight of filler and 450 parts by weight of aggregate based on 100 parts by weight of the binder prepared on the semi-cured unsaturated polyester resin. After injecting the grooves to form a complete curing, the fiber-reinforced plastic was sprayed on the bottom of the lower plate to form a fiber-reinforced plastic layer to prepare an induction block.

<실시예 8><Example 8>

불포화 폴리에스터수지 100중량부데 대하여 수축저감제 10중량부를 혼합하여 바인더를 제조한 후, 바인더 100중량부에 대하여 색소 2중량부 및 경화제 1중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분간 양생하여 반경화시킨 다음, 반경화된 불포화 폴리에스터수지 위에 상기에서 제조한 바인더 100중량부에 대하여 경화제 1중량부, 충진제 130중량부 및 골재 540중량부의 성분비를 갖는 폴리머 콘크리트를 내부에 홈부가 형성되도록 타설하여 반경화시킨 후, 하판의 바닥에 섬유강화 플라스틱을 분사하지 않고 유도블럭을 제조하였다.After preparing a binder by mixing 10 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin, 2 parts by weight of a dye and 1 part by weight of a curing agent were added to 100 parts by weight of the binder, and then poured by the portion corresponding to the induction block top plate. Cured for 20 minutes and cured, and then the polymer concrete having a component ratio of 1 part by weight of a curing agent, 130 parts by weight of filler, and 540 parts by weight of aggregate based on 100 parts by weight of the binder prepared on the semi-cured unsaturated polyester resin was grooved therein. After pouring to form an addition and semi-cured, an induction block was prepared without spraying the fiber-reinforced plastic on the bottom of the lower plate.

<시험예 1><Test Example 1>

상기 실시예 1내지 8에서 제조한 폴리머 콘크리트를 이용한 유도블럭과 기존 콘크리트 유도블럭을 보도용 콘크리트판의 품질 규정인 KS F 4001에 의한 파괴하중, 석재의 비중 및 흡수율 시험방법을 규정한 KS F 2518에 의한 비중 및 흡수율, KS F 2481 규정에 의한 압축강도, KS F 2438 규정에 의한 탄성계수, KS F 2482규정에 의한 휨강도 및 KS F 2480 규정에 의한 인장강도를 각각 측정하고 그 결과를 표 1에 나타내었다.KS F 2518 which defines the testing method for breaking load, specific gravity and absorption rate of stone according to KS F 4001, which is the quality regulation of sidewalk concrete plate, using induction blocks using polymer concrete prepared in Examples 1 to 8 Specific gravity and water absorption rate, compressive strength according to KS F 2481, elastic modulus according to KS F 2438, flexural strength according to KS F 2482, and tensile strength according to KS F 2480, respectively. Indicated.

구분division 파괴하중(kgf)Breaking load (kgf) 비중importance 흡수율(%)Absorption rate (%) 압축강도(kg/㎠)Compressive strength (kg / ㎠) 탄성계수(×105kg/㎠)Modulus of elasticity (× 10 5 kg / ㎠) 휨강도(kg/㎠)Flexural strength (kg / ㎠) 인장강도(kg/㎠)Tensile Strength (kg / ㎠) 실시예 1Example 1 1,500 이상1,500 or more 2.282.28 0.150.15 1,4001,400 2.902.90 236236 145145 실시예 2Example 2 1,300 이상1,300 or more 2.292.29 0.170.17 1,1001,100 2.712.71 223223 124124 실시예 3Example 3 1,500 이상1,500 or more 2.272.27 0.140.14 1,5001,500 3.143.14 240240 151151 실시예 4Example 4 1,500 이상1,500 or more 2.262.26 0.160.16 1,4001,400 2.912.91 236236 145145 실시예 5Example 5 1,400 이상1,400 or more 2.292.29 0.140.14 1,3001,300 2.882.88 231231 138138 실시예 6Example 6 1,400 이상1,400 or more 2.322.32 0.180.18 1,3001,300 2.822.82 231231 138138 실시예 7Example 7 1,500 이상1,500 or more 2.212.21 0.110.11 1,4001,400 2.942.94 236236 145145 실시예 8Example 8 1,200 이상1,200 or more 2.282.28 0.150.15 1,4001,400 2.912.91 236236 145145 보도용콘크리트Press Concrete 1,200 이상1,200 or more 2.402.40 5.005.00 300300 2.352.35 5555 2525

상기 표 1에서 보듯이 실시예 1내지 8의 보도용 폴리머 콘크리트가 기존의 보도용 콘크리트에 비해 압축강도, 탄성계수, 휨강도 및 인장강도 모두 월등히 뛰어난 것을 알 수 있다.As shown in Table 1, it can be seen that the polymer concrete for the walkway of Examples 1 to 8 is much superior in compressive strength, elastic modulus, flexural strength, and tensile strength as compared with the conventional walkway concrete.

특히, 수축저감제를 10중량부 첨가한 실시예 1의 경우, 수축저감제를 15중량부를 초과하여 20중량부를 첨가한 실시예 2에 비해 파괴하중, 압축강도, 휨강도 및 인장강도 모두 뛰어난 것을 알 수 있다. 또한 수축저감제를 7중량부 미만인 5중량부를 첨가한 실시예 3의 경우 실시예 1에 비하여 압축강도, 휨강도 및 인장강도는 약간 뛰어나지만 보도블럭 제조시 불포화 폴리에스터수지의 수축을 효과적으로 방지하지 못하여 수치의 불안정성을 나타내었다.In particular, in the case of Example 1 in which 10 parts by weight of the shrinkage reducing agent was added, it was found that the fracture load, the compressive strength, the bending strength, and the tensile strength were superior to those in Example 2 in which the shrinkage reducing agent was added in excess of 15 parts by weight of 20 parts by weight. Can be. In addition, in the case of Example 3 in which 5 parts by weight of less than 7 parts by weight of shrinkage reducing agent was added, the compressive strength, bending strength, and tensile strength were slightly superior to those of Example 1, but it did not effectively prevent the shrinkage of the unsaturated polyester resin when manufacturing the press block. Numerical instability was shown.

충진제의 양이 160중량부를 첨가하여 보도블럭을 제조한 실시예 4의 경우 실시예 1에 비해 강도가 높거나 유사한 것을 알 수 있으나 작업시 불포화 폴리에스터수지의 양이 적어 작업성이 떨어진다는 문제점이 발생하였다. 또한 충진제의 양이 100중량부 첨가된 실시예 5의 경우 상대적으로 폴리머의 사용량이 많아 혼합은 용이하나 강도가 실시예 1에 비해 떨어지는 단점이 있다.In Example 4, in which the amount of the filler was added to 160 parts by weight, it was found that the strength of the press block was higher or similar to that of Example 1, but the workability was poor due to the low amount of unsaturated polyester resin during the work. Occurred. In addition, in the case of Example 5 in which the amount of the filler is added to 100 parts by weight, the amount of the polymer is relatively high and the mixing is easy, but the strength is inferior to that of Example 1.

골재량을 650중량부 첨가하여 보도블럭을 제조한 실시예 6의 경우 실시예 1에 비해 상대적으로 폴리머의 사용량이 적어져 결합력이 약해져 충진이 제대로 되지 않아 파괴하중, 휨강도 및 인장강도가 떨어지는 것을 확인 할 수 있다. 또한 골재량을 450중량부 첨가한 실시예 7의 경우 실시예 5와 유사한 결과를 나타냄을 볼 수 있다.In the case of Example 6, in which the amount of aggregate was added to 650 parts by weight of the aggregate, the amount of the polymer used was less than that of Example 1, so that the bonding strength was weakened, so that the filling was not properly performed, so that the fracture load, the bending strength and the tensile strength decreased. Can be. In addition, it can be seen that in Example 7 with the addition of 450 parts by weight of aggregates, results similar to those of Example 5 were obtained.

또, 하판의 바닥면에 섬유강화 플라스틱을 접착하지 않은 실시예 8의 경우 실시예 1에 비해 압축강도, 휨강도 및 인장강도 모두 비슷한 결과를 보이나 파괴하중이 떨어지는 문제점이 발생하였다.In addition, in the case of Example 8 in which the fiber-reinforced plastic was not adhered to the bottom surface of the lower plate, the compressive strength, the bending strength, and the tensile strength were similar to those of Example 1, but the failure load was lowered.

실시예 1의 경우 흡수율이 0.15로 종래 보도용 콘크리트 보다 매우 낮은 것을 알 수 있다. 이것은 폴리머 콘크리트가 경화하는 동안 불포화 폴리에스터 수지가 중합반응을 일으켜 단단하게 되므로 공극을 형성하지 못하기 때문이다. 따라서 내부에 연속된 공극이 없기 때문에 동결융해를 반복할 경우 시멘트 콘크리트의 경우 강도가 크게 저하되지만 폴리머 콘크리트의 경우 영향을 받지 않아 동결 파손될 염려가 없다.In the case of Example 1 it can be seen that the absorption rate is very low than the conventional concrete for 0.15. This is because the unsaturated polyester resin polymerizes and hardens during curing of the polymer concrete, and thus does not form voids. Therefore, since there is no continuous void inside, repeated freezing and thawing significantly decreases the strength of cement concrete, but there is no fear of freezing and breakage because the polymer concrete is not affected.

상술한 바와 같이, 상판은 불포화 폴리에스터수지로 하고, 하판은 불포화 폴리에스터수지를 바인더로 첨가한 폴리머 콘크리트로 하여 유도블럭을 제조하므로써 접착력이 감소되지 않고, 하판 내부를 중공상태로 제조하여 중량을 절감할 수 있어 시공이 간편하고, 강도도 우수할 뿐만 아니라, 낮은 흡수율에 따른 동결 파손을 효과적으로 방지 할 수 있는 폴리머 콘크리트를 이용한 유도블럭의 제조방법을 제공하는 유용한 발명인 것이다.As described above, the upper plate is made of unsaturated polyester resin, and the lower plate is made of polymer concrete in which unsaturated polyester resin is added as a binder. It is a useful invention to provide a method of manufacturing an induction block using polymer concrete that can reduce the construction is simple, excellent in strength, and effectively prevent freeze damage due to low absorption rate.

Claims (2)

불포화 폴리에스터수지 100중량부에 대하여 수축저감제 7내지 15중량부를 혼합하여 바인더를 제조하는 제 1공정과; 상기 제 1공정에서 제조한 바인더 100중량부에 대하여 색소 1내지 2중량부와 경화제 1내지 2중량부를 첨가하여 유도블럭 상판에 해당하는 부분만큼 타설한 뒤 20분 정도 양생하여 반경화시키는 제 2공정과; 반경화된 불포화 폴리에스터수지 위에 상기 제 1공정에서 제조한 바인더 100중량부에 대하여 경화제 1내지 2중량부, 충진제 120내지 140중량부 및 골재 500내지 600중량부의 성분비를 갖는 폴리머 콘크리트를 타설하여 완전경화시키는 제 3공정과; 완전경화된 하판의 바닥에 불포화 폴리에스터 수지와 유리섬유를 혼합한 섬유강화 플라스틱을 분사하여 섬유강화 플라스틱층을 형성시키는 제 4공정으로 이루어지는 것을 특징으로 하는 폴리머 콘크리트를 이용한 유도블럭의 제조방법.A first step of preparing a binder by mixing 7 to 15 parts by weight of a shrinkage reducing agent with respect to 100 parts by weight of an unsaturated polyester resin; A second step of curing by adding about 1 to 2 parts by weight of dye and 1 to 2 parts by weight of curing agent to the portion corresponding to the induction block top plate and curing for about 20 minutes after curing by adding 100 parts by weight of the binder prepared in the first step; ; Completely cast polymer concrete having a component ratio of 1 to 2 parts by weight of curing agent, 120 to 140 parts by weight of filler and 500 to 600 parts by weight of aggregate based on 100 parts by weight of the binder prepared in the first step on the semi-cured unsaturated polyester resin. A third step of curing; And a fourth step of forming a fiber-reinforced plastic layer by spraying a fiber-reinforced plastic mixed with an unsaturated polyester resin and glass fibers on the bottom of the fully cured bottom plate. 제 1항에 있어서, 유도블럭의 하판이 내부에 홈부가 형성 되도록 제조하는 것을 특징으로 하는 폴리머 콘크리트를 이용한 유도블럭의 제조방법The method of claim 1, wherein the lower plate of the induction block is manufactured to have a groove formed therein.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101142970B1 (en) * 2009-11-19 2012-05-08 곽은구 Unsaturated polyester resin complex for concrete mold form panel
KR102011338B1 (en) * 2019-03-15 2019-08-19 이성철 Concrete Sign Block And Manufacturing Method Thereof

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KR100933910B1 (en) 2008-06-09 2010-01-07 대일산업 주식회사 Braille block and method for producing the same
KR101040656B1 (en) * 2008-08-12 2011-06-10 고려대학교 산학협력단 Preventing Method of Debonding Failure for Sprayed FRP
CN104446151A (en) * 2014-12-18 2015-03-25 无锡伊诺永利文化创意有限公司 Formula of healthy and environment-friendly board

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101142970B1 (en) * 2009-11-19 2012-05-08 곽은구 Unsaturated polyester resin complex for concrete mold form panel
KR102011338B1 (en) * 2019-03-15 2019-08-19 이성철 Concrete Sign Block And Manufacturing Method Thereof

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